Machine for applying pressure to shoe bottoms



R. G. MADAN Jan. 14, 1941.

MACHINE FOR APPLYING PRESSURE T0 snom BOTTOMS Filed Aug. 15, 1939 s Sheets-Sheet 1 Q AWE/Wm? f 2 w I) A), M

Jan. 14, 1941. R. G. MADAN 2,228,467

MACHINE FOR APPLYING PRESSURE TO SHOE BOTTOMS Fiied Aug. 15, 1939 s Sheets-Sheet 2 A/vEA/m/P W Figzfl- W333; 5%

Patented Jan. 14, 1941 UNITED STATES PATENT OFFICE MACHINE FOR APPLYING PRESSURE TO SHOE BOTTOMS Jersey Application August 15, 1939, Serial No. 290,324

17. Claims.

This invention relates to machines for applying pressure to shoe bottoms, for example, in the cement-attaching of soles to shoes, and particularly to pads and pad boxes for use in such machines.

Objects of the invention are to provide a pad and a pad-supporting box which are capable of quick and accurate adjustment to cause the pressing surface of the pad to assume the longitudinal contour of the bottom of a shoe irrespective of the height of the heel which the shoe isdesigned to have.

As illustrated, a hollow pad of molded rubber is provided, the pad being initially formed with a top surface adapted to fit the bottom of a shoe which is tohave a heel of medium height. A pad so molded and filled with water is well adapted to be bent farther along the location of the ball line to accommodate a higher heel or to be flattened so-as to accommodate a lower heel. 20 the bottom and sides of the pad are supported by a box the forepart of which is movable about a fixed transverse'axis located vertically about half way of the height of the pad andsubstantially beneath the ball line of a shoe placed on the pad. 25 The shank portion of the pad rests on a shank support forming the bottom of the rear portion of the pad box, which shank support is adjustable about a pivot extending transversely of the box and located beneath the pivot of the forepart of the box. The rear part of the pad; is supported by means movable heightwise of the box'and extensibly connected to the rear end of the shank support. Means is provided for effecting accurate heightwise adjustment of the rear part of the pad support comprising a toggle and a right and left-hand screw for operating the toggle. When adjusted heightwise, the support for the rear end of the box carries with it the rear end of the shank support. Similar means is provided for adjusting the forepart of the box about its pivot and, by operating the two adjusting means, the contour of the pressing surface of the pad may be changed to correspond substantially to the longitudinal contour of any shoe bottom.

These and other features of the invention will appear more fully from the following description when read in connection with the accompanying drawings and will be pointed out in the appended claims.

In the drawings,

Fig. 1 is a side elevation, partly insection, of a. pad and pad box embodying the present invention, the extreme toe portion of the pad and 55 box being broken away;

Fig. 2' is a plan view of the pad box, the end portions being omitted;

Fig. 3 is a detail in side elevation of the rear end of the box;

Fig. 4 is a front elevation of means for adjust- 5 'ing the forepart of the box;

,Fig. 5 is an explodedview of the pad-supporting' and adjusting means at the rear end of the box; and

Fig. 6 is a rear elevation, partly in section, showing the means for adjusting the rear end of the box.

A pad box embodying the present invention, as illustrated in Fig. 1, comprises a base It) adapted to be secured to the padbox support of a machine of the type disclosed in. Letters Patent of the UnitedStates No. 2,047,185, granted July 14, 1936, upon application of Ballard. et al. The rear part of the base is formed with a rear wall I2 and two side walls [4, I6 which embrace the rear portion of a pad IS. The pad l8 is preferably a water pad,. that is, a hollow rubber vessel filled with water. The hollow pad is molded of rubber, the top or pressing surface of the pad being reinforcedby layers of canvas 20. As initially molded, the pad preferably has a pressing surface of a contour to fit a shoe bottom which is to have a heel of medium height, for example an 18/8 heel, i. e., a heel two and a quarter inches in height. A pad thus molded can be flattened to accommodate the bottoms of shoes which are to have lower heels and can be bent farther to conform to the bottoms of shoes that are to have higher heels without straining unduly either the top or the bottom layers of. the pad. In changing the longitudinal contour of the pad to correspond to the longitudinal contours of different shoe bottoms, it should be bent about a transverse axis located substantially beneath the ballline of the shoe. To this end the forepart of the pad I8 is 4 enclosed in a forepart box having side walls 22 and 24', a bottom wall 26' and. a front wall 21 (Fig. 4) at the toe end of the pad. The side wall 22 is pivoted to the side wall M of the rear part of the box by a pivot stud 28 held in place by a screw 30,, the side wall 24 being similarly pivoted. to the rear side wall IS, the axes of the pivots, of course, being intransverse alinement and located between the top and bottom walls of the pad I 8. As shown, the pivots are approximately'midway between the top and bottom walls of the pad.

To adjust the forepart of the box up and down about the fixed pivots 28, the mechanism shown in'Fi-gs. 1 and 4 is provided. A bar 32 is pivoted at each end by a, pivot 34 to an ear 38 projecting downwardly from the bottom of the forepart of the box. At the center of the bar 82 is a pivot pin 38 which passes through the bar and through adjacent ends of two pairs of links, one pair 40, 42 being located on the front side of the bar and the other pair 44, 45 (Fig. 1) on the rear side of the bar. The free ends of the links 42, 40 are pivoted to studs 48 projecting from opposite sides of a block 50 which is tapped to receive a threaded portion 52 of a rod 54. The free ends of the links 40, 44 are similarly pivoted at 50 to a block 50 tapped to receive a threaded portion 60 of the rod 54. The threaded portion 60 has a right hand thread and the threaded portion 52 has a lefit-hand thread so that when the rod 54 is turned by a hand-wheel 52 the toggle formed by the links 40, 42 on one side of the bar 32 and the toggle formed by the links 44, 45 on the rear side of the bar will be bent and straightened to raise and lower the front portion of the pad box about its pivot 28. The amount of elevation of the front end of the pad box is indicated by a scale 64 adjustably secured to the pad box by screws 65 which pass through slots in the scale. An indexfinger 65 fixed at 58 to the base I0 cooperates with graduations on the scale 64 to indicate the heel height for which the forepart of the pad is adjusted. For convenience in assembling, the rod 54 is prefer-ably mounted for rotation in upwardly open notches I0 formed in the base I0 and is retained in place by screws I2 having conical ends extending into the notches 10 above it. The bottom of the shank portion of the box is formed by a shank-supporting plate I4 pivoted at its front edge by screws I6 which are threaded through ear-s 18 formed on the base- I0. The joint between the bottom 26 of the forepart of the box and the plate I4 is covered by a thin plate 80, the plate being secured to the bottom 26 by screws 82 and having its ends upturned at 84 (Fig. 5) to cover the joint at 28 between the front and rear parts of the box. The rear edge of the plate 80 engages a rabbet 86 on the plate I4, sufiicient clearance being allowed between the edge of the plate 80 and the rabbet 86 to permit movement of the forepart of the box about the pivot 28 and of the shank-supporting plate "I4 about the pivot 70. The shank plate I4 is preferably upwardly convex longitudinally of the pad and carries at each side a plate 88 having at its lower end a pivot stud 90 which enters a hole 92 in an ear S3 projecting downwardly from the plate I4 and located about midway of the length of the plate. To the upper ends of the plate 88 are attached by screws 94 partial mask plates 00 which extend inwardly over the pad and its cover, if a cover is employed, and serve to hold the pad in place on the plate I4 as it is adjusted about its pivot I6. To the rear end of the shank plate I4 is pivoted a plate 98, the plate 14 having ears through which screws I00 pass and enter the plate 98. The plate 98 is slotted at [0| to receive screws I02 by which it is slidingly secured to a vertically movable heel plate or support I04. The heel plate I04 has downwardly extending ears I06 to which a casing I08 for the rear end of the pad is secured by screws I10, the screws III! passing through countersunk holes H2 in the casing I08 and being threaded into .the ears I05. The casing I08, as shown in Fig. 5, has side, rear and bottom walls to receive the rear end of the pad I8 and flanges II4 which extend over the top of the pad at the two sides. The casing I08 thus serves toconblocks I20, I28 by studs I30, I32, respectively, and

the other pair of links I84, I35 (Fig. 6) having their free ends secured, respectively, to similar studs I30, I32 on the rear side of the blocks I26, I28. The block I2 6 is tapped to receive a lefthand threaded portion I38 of a rod I40 and the block I is tapped to receive .a right-hand threaded portion I42 of the rod I40, the rod being mounted for rotation in the front side Wall I4 and in a bearing I43 secured to the rear side wall It of the pad box. This rod is arranged to be turned by a hand-wheel I44 to raise and lower the plate I04. For convenience in assembling, the bearing I43 (Fig. 6) is formed in a separate member I45 secured at M? to the rear wall I6. When the plate I04 is thus raised or lowered, the plate 98 is carried up and down with it and, since the plate 00 is pivoted at I00 to the shank-supporting plate I4 which turns about the fixed pivot I0, the plate 98 shifts forwardly and rearW-a-rdly slightly as permitted by the slots IOI which loosely engage the screws I02. To indicate the amount of up-and-do-wn motion ofthe rear end of the bad as the hand-wheel I44 is turned, an index finger I40 (Fig. 3) is attached at I48 to the casing I08 .and cooperates with a scale I50 adjusta'bly secured by screws I52 which pass through slots in the scale I50 and are threaded into the wall I6 of the pad box.

Preferably a cover I54 is provided for the pad I8, the cover being retained in place (Fig. 2) by the usual mask plates and by clips I56 attached to the sides of the forepart of the box and extending inwardly over the edges of the cover I54. At the rear end of the box a plate I58 underlying the cover I54 is secured at I60 to the top end of a vertical slide I62 with which pad boxes of this type are usually provided, the slide carrying the usual mechanism for locating the rear end of the shoe and sole. Side extensions I04 of the plate I58 are turned up over the cover I54 to hold its rear end in place and cause it to be moved up and down with the vertical slide I62.

In use, all the adjustments of the pad to adapt it for attaching soles to shoes that are to have heels of any usual height may be made by turning independently or together the two handles or wheels 62, I44. With the illustrated mechanism, turning of these hand-wheels toward each other, that is, turning the hand-wheel B2 to the right and'the hand-wheel I44 to the left, will raise the forepart of the pad about its fixed center 28 and will raise the rear part of the pad vertically, causing the shank-supporting plate I4 to turn about its fixed center I6, the amount of adjustment being indicated by movement of the scale 64 with respect to the index finger 66 for the forepart and by movement of the index finger I46 with respect to the scale I50 for the rear part. Supposing a shoe that is to have a heel one inch high is to have its sole attached, the hand-wheels 62, I44 would be turned as described until each of the index fingers 65, I40 is opposite the numeral 8 on its respective scale. The scales 64, I50 are calibrated by adjusting the pad so that its longitudinal contour corresponds successively to a series of lasts having successively higher heels and marking the position of the index finger on the scales after each adjustment. When lasts of a different style are used, it may be necessary to shift the scales heightwise slightly to obtain proper scale readings. This can be effectedreadily by loosening the screws 55 holding the scale 64 and the screws lEZholding the scale I50 and adjusting the scales up or down as'required and then tightening the screws. Thereafter the graduations will indicate the proper adjustment of the padfor a series of lasts of that style and which are to have heels of different height.

Having thus described my invention, what I claim asnew and desire to secure by Letters Patent of the United States is:

1-. Apparatus for use in applying pressure to shoe bottoms comprising a relatively thick pad of yielding material, a support for the forepart of the pad movable about a fixed transverse axis located beneath the ball portion of a shoe placed upon the pad and approximately midway of the thickness of the pad, a toggle connected to the forepart support, and screw means for operating the toggle to move the forepart support about said axis to vary the longitudinal contour of the pad.

2. Apparatus for use in applying pressure to shoe bottoms comprising a relatively thick pad of yielding material, a support for the forepart of the pad movable about a fixed transverse axis located beneath the ball portion of a shoe placed upon the pad and approximately midway of the thickness of the pad, and means comprising a toggle and a right and left hand screw for operating the toggle to move the forepart support about said axis to vary the longitudinal contour of the pad.

3; Apparatus for use in applying pressure to shoe bottoms comprising a relatively thick pad of yielding material, means for supporting the forepart of the pad, means for supporting the shank part of the pad, means for supporting the heel part of the pad, means for adjusting the forepart of the pad about a fixed center located midway of the thickness of the pad, means for adjusting the support for the shank of the pad about a fixed center located below the lower side of the pad, and means for indicating to the operator the amount of adjustment given to the forepart support and to the shank support.

.4. Apparatus for use in applying pressure to shoe bottoms comprising a thick pad of yielding material, means for supporting the forepart of the pad, means for supporting the shank part of the pad, means for adjusting the forepart of the pad about a fixed center located midway of the thickness of the pad, means for adjusting the shank support about a fixed center located below the lower side of the pad, and separate means for indicating to the operator when equal amounts of adjustment have been given respec tively to the forepart support and the shank support.

5. Apparatus for use in applying pressure to shoe bottoms comprising a relatively thick pad of yielding material, a support for the shank and rear part of the pad movable about a transverse axis, a support for the forepart of the pad movable about a transverse axis located beneath the ball portion of a shoe placed upon the pad and approximately midway of the thickness of the pad, means for adjusting the forepart support about said axis, and means for adjusting the shank support about a separate axis to vary the longitudinal contour of the pad.

6. Apparatus for use in. applying pressure to shoe bottoms comprising a pad of yielding material, a box enclosing an end portion of the pad, a support'in said box for the shank portion of the pad, mask plates extending over opposite sides of the shank portion of the pad, means for pivotally connecting said mask plates to the shank support, and means for adjusting the shank support heightwise of the box;

'7. Apparatus for use in applying, pressure to shoe bottoms comprising a pad of. yielding material, a box enclosing an end portion of the pad, a support in said box for said end portion, means for adjusting said support heightwise to vary the longitudinal contour of the pad, and a casing embracing the end portion of the pad, said casing being connected to the support so that the pad will be moved up and down in the box when the support is adjusted.

8. Apparatus for use in applying pressure to shoe bottoms comprising apad of yielding material, a fixed box enclosing the heel end portion of the pad, a separate box enclosing and supporting the forepart of the pad, said separate box being pivoted to the fixed heel end box, a support in the fixed box for the shank portion of the pad, mask plates extending over opposite sides of the shank portion of the pad and carried by the shank support, means for adjusting the shank support heightwise of the fixed box, and means for adjusting the forepart box about its pivot.

9. Apparatus for use in applying pressure to shoe bottoms comprising a pad of yielding material, a box enclosing the end portion of the pad, a support in said box for the heel portion. of the pad, a shank support pivoted to saidsupport for the heel portion, means for adjusting the support for the heel portion heightwise of the pad to vary the longitudinal contour of the pad, a casing embracing the support for the heel portion of the pad and connected thereto so that the pad will be carried up and down when the support for the heel end is adjusted, and mask plates connected to the shank support.

10. Apparatus for use in applying pressure to shoe bottoms comprising a pad of yielding material, a forepart box enclosing and supporting the forepart of the pad and pivoted about a fixed axis, a box embracing the shank and heel portions of the pad, separate members in said last-mentioned box for supporting the shank. and heel portions of the pad, the front end of the shank support being pivoted adjacent to the axis of the forepart box, 5

the rear end of the shank support being connected to the heel support for heightwise movement therewith, and means for raising and lowering the heel support relatively to the box for the heel portion of the pad.

11. Apparatus for use in applying pressure to shoe bottoms comprising a relatively thick pad of yielding material, means for supporting the forepart of the pad, means for supporting the shank part of the pad, means for adjusting the forepart support about a transverse axis located midway of the thickness of the pad, means for adjusting the shank support about a transverse axis located below the lower side of the pad, means for indicating to the operator the amount of adjustment given to the forepart support about its axis, and means for indicating to the operator the amount of adjustment given to the shank support about its axis.

12. Apparatus for use in applying pressure to shoe bottoms comprising a relatively thick hollow pad containing a fixed quantity of liquid, a support for the forepart of the pad arranged for movement about a fixed transverse axis located midway of the thickness of the pad and substantially under the ball line of a shoe placed on the pad, a support for the shank portion of the pad mounted for movement about a fixed axis beneath the pad, a support for the heel end of the pad, means for adjusting the heel support heightwise to vary the position of the rear end of the pad, and a plate pivoted to the rear end of the shank support and connected to the heel support, said connection permitting relative movement lengthwise of the plate between the heel support and pad.

13. Apparatus for use in applying pressure to shoe bottoms comprising a relatively thick hollow pad containing a fixed quantity of liquid, a support for the forepart of the pad arranged for movement about a center located midway of the thickness of the pad and substantially under the ball line of a shoe placed on the pad, a support for the shank portion of the pad mounted for movemen-t about a fixed axis located beneath the pad, a support for the heel end of the pad, means comprising a toggle and a right and left hand screw for adjusting the heel support heightwise to vary the position of the rear end of the pad, and connections between the shank support and the heel support which permit relative movement lengthwise of the pad between the heel support and the shank support.

14. Apparatus for use in applying pressure to shoe bottoms comprising a rubber vessel containing a fixed quantity of fluid, said vessel being so molded that its top surface corresponds to the longitudinal curvature of a shoe that is to have a heel of medium height, and a support for the forepart of the rubber vessel, said support being mounted for adjustment about a fixed transverse axis located substantially under the ball line of a shoe located on the vessel and midway of the height of the vessel whereby movement of the support about said center to vary the longitudinal contour of the vessel will equalize the compressive and tensional strains set up in the top' and bottom walls of the vessel when bent about said axis to accommodate shoes that are to have high and low heels.

15. Apparatus for use in applying pressure to shoe bottoms comprising a relatively thick hollow pad containing a fixed quantity of liquid, a support for the foreport of the pad arranged for movement about a fixed axis located midway of the thickness of the pad and substantially under the ball line of a shoe placed on the pad, a support for the shank portion of the pad mounted for movement about a fixed axis below the lower wall of the pad, a support for the heel end of the pad, means for adjusting the heel support heightwise to vary the position of the rear end of the pad, a plate pivoted to the rear end of the shank support and connected to the heel support, said connection permitting movement of the plate lengthwise of the .pad between the heel support and the pad, and means for adjusting the forepart support heightwise of the pad.

16. Apparatus for use in applying pressure to shoe bottoms comprising a relatively thick hollow pad containing a fixed quantity of liquid, a support for the forepart of the pad arranged for movement about a fixed axis located midway of the thickness of the pad and substantially under the ball line of a shoe placed on the pad, a support for the shank portion of the pad mounted for movement about a fixed axis below the lower wall of the pad, a support for the heel end of the pad, means for adjusting the heel support heightwise to vary the position of the rear end of the pad, a plate pivoted to the rear end of the shank support and connected to the heel support, said connection permitting movement of the plate lengthwise of the pad between the heel support and the pad, means for adjusting the forepart support heightwise of the pad, and means for indicating to the operator the amount of each adjustment.

17. Apparatus for use in applying pressure to shoe bottoms comprising a rubber vessel containing a fixed quantity of fluid, said vessel being so molded that its top surface when the vessel is unstressed corresponds to the longitudinal curvature of the bottom of a shoe that is to have a heel of medium height, supports for the shank and heel portions of the vessel, and a support for the forepart of the vessel, said support being mounted for adjustment about a fixed transverse axis located substantially under the ball line of a shoe located on the vessel and midway of the height of the vessel whereby movement of the support abut said center to vary the longitudinal contour of the vessel Will equalize the compressive and tensional strains set up in the top and bottom walls of the vessel when bent about said axis to accommodate shoes that are to have higher and lower heels than that for which the vessel was molded.

ROYAL G. MADAN. 

